Mamma mia, this is a great learning experience!
Thank you very much Blajinov and TIG for your help, is much appreciated!

Hi TIG, thanks for your help. There's a problem with the fillet created this way, though: it doesn't revolve correctly around the "arm". See picture, taken from your kind example: on one side the arc points inward, on the other side points outward.

Hi TIG and all, today I spent some quality time trying to achieve the result of this procedure with Extrude Edges by Rails plugin: http://www.youtube.com/watch?v=SUYN_Uqzvec.

Any idea if and how is possible to produce this kind of result?
Thanks in advance for the plugin and any help.

WOW!

Great ruby, Kirill!

Stunning work!
Any insight on making the main ship model would be much appreciated. It's quite a strange shape, isn't it?

Excellent examples of organic modeling within Sketchup!

Men, this plugin with help of fantasy and skills (like Simon') are a killer combo!

Go Fredo Go!!!

Yes it's a tricky edge to deal with.
To date Pilou's solution is the most clean and customizable.

Thanks for your help, guys!
I like TIG solution best, but man! That's a crazy workflow to bevel an edge!
OK, we'll survive, gonna play around that...

Well, I'm for a simple bevel, like the one at the top of the nested shape.
By the way after some tests I believe is not possible to achieve it in SketchUp.
It looks like the problem is the base of the cylinder is curved in two ways: as a circle and as laying over the underlying curved surface.

I'm trying to bevel an inner edge of two intersected objects; I tried using FollowMe and Bezier RoundEdge but can't get it.
Any suggestion?